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670×103 ppm
160×103 ppm
93×103 ppm
72×103 ppm
16×103 ppm
5×103 ppm to 11×103 ppm
2.6×103 ppm to 7.8×103 ppm
3 ppm to 8.5×103 ppm
2×103 ppm to 5.2×103 ppm
900 ppm
140 ppm to 700 ppm
240 ppm
180 ppm
100 ppm to 200 ppm
20 ppm to 70 ppm
0.7 ppm to 28 ppm
10 ppm
7.7 ppm
0.23 ppm to 3.3 ppm
0.14 ppm to 3.2 ppm
0.9 ppm to 2.2 ppm
1 ppm to 2 ppm
0.33 ppm to 2.4 ppm
0.2 ppm to 2.3 ppm
0.42 ppm to 1.9 ppm
0.07 ppm to 1.6 ppm
0.33 ppm to 1 ppm
0.024 ppm to 0.84 ppm
0.02 ppm to 0.7 ppm
0.028 ppm to 0.65 ppm
0.009 ppm to 0.65 ppm
0.05 ppm to 0.5 ppm
0.12 ppm to 0.35 ppm
0.009 ppm to 0.28 ppm
0.14 ppm
0.042 ppm to 0.19 ppm
0.09 ppm
0.08 ppm
0.07 ppm
0.05 ppm
0.032 ppm
0.023 ppm
0.02 ppm
0.018 ppm
0.017 ppm
0.0014 ppm
0.0009 ppm
0.00075 ppm
0.0004 ppm
0.23×10-9 ppm
Bowen, H. J. M. Environmental Chemistry of the Elements. London: Academic Press, Inc., 1979.
Emsley, John. The Elements, 3rd edition. Oxford: Oxford University Press, 1998.
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